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89 lines
4.5 KiB
89 lines
4.5 KiB
libapt-pkg v2 to v3 incorperates several source-incompatible changes that
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people need to be aware of.. Many of this changes are done so that most old
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source will continue to function, but perhaps at reduced functionality.
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* pkgDepCache is no longer self initilizing, you have to call the Init
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method seperately after constructing it. Users of pkgCacheFile do not
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need to worry about this
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* GetCandidateVer/etc is gone from the pkgCache. It exists only in the
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DepCache and is just an inline around the new Policy class
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* TargetVer/TargetDist have been eliminated. Nothing should have been using
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these.
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* There is a policy class. The v0 policy engine which has been used since
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APT 0.0.0 is instantiated by the DepCache by default. However pkgCacheFile
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constructs and initializes the new v4 engine. People accessing GetCandidate
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version outside of a CacheFile/DepCache will need to instantiate and
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initialize a policy engine on their own.
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* All byte counters are now doubles to advoid 4G wraparound. The compiler
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should generate warnings on any incorrect use of these.
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* The PriorityType/CompType/DepType functions have been moved out of the
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iterators and into generate static functions of pkgCache - inline stubs
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are left in the iterators.
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* The deb dependency element parser has been made into a static function
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of the list parser and enhanced to optionally understand architecture
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restrictions.
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* TagSections no longer include the trailing \n. This means that the
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Offset/Length of a package record in the version structure also does not
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include the trailing \n.
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* GenCaches::SelectFile accepts a site parameter now too.
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* Global version compare functions are gone. If you
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#define APT_COMPATABILITY 1
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They will come back as they were before. Code should be updated to
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reference the compare functions to the VersioningSystem (VS) referenced
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by the Cache or _system structures.
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* Initialization is now two stage (define APT_COMPATABILITY..) The first
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stage, pkgInitConfig is called before commandline parsing, and
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pkgInitSystem is called after. This gives the user the oppertunity to
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override default settings from the config files before startup has been
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finalized.
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* pkgSourceList has been gutted. All the junk that was in there before is
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cleaned up and put in the pkgIndexFile class. There is very little API
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corrispondence here..
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* pkgMakeStatusCacheMem is gone, pkgMakeStatusCache does the same thing if
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you set the AllowMem flag. Also, you can get a copy of the map used to
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store the cache to advoid having to remap it in the calling code. A bunch
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of other cache related functions are gone, but nobody should have been using
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them in the first place!
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* Downloading the 'Package' and 'Source' index files is different, use
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the GetIndexes call in SourceList.
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* SourceRecords::Parser::Source is gone, replaced with Index which does
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much the same thing.
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* DynamicMap has changed slightly, nobody should care
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* pkgMakeOnlyStatusCache exists, which creates a really small cache that
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only contains the status file, and in memory.
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* The pkgRecords stuff is changed to abstract through the index file list
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(should be transparent largely)
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* Locking is handled differently, there is no dpkg lock class, the _system
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class provides Lock/UnLock methods
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* pkgDepCache is not a subclass of pkgCache, it agregates it now. Some
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compatibility functions are provided that make this transition fairly
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easy.
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* The following functions have had minor argument changes:
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- pkgSimulate(pkgDepCache &Cache);
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+ pkgSimulate(pkgDepCache *Cache);
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- pkgProblemResolver(pkgDepCache &Cache);
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+ pkgProblemResolver(pkgDepCache *Cache);
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- pkgDepCache(MMap &Map,Policy *Plcy = 0);
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+ pkgDepCache(pkgCache *Cache,Policy *Plcy = 0);
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- pkgOrderList(pkgDepCache &Cache);
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+ pkgOrderList(pkgDepCache *Cache);
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- pkgPackageManager(pkgDepCache &Cache);
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+ pkgPackageManager(pkgDepCache *Cache);
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- pkgCache(MMap &Map,bool DoMap = true);
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+ pkgCache(MMap *Map,bool DoMap = true);
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- pkgCacheGenerator(DynamicMMap &Map,OpProgress &Progress);
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+ pkgCacheGenerator(DynamicMMap *Map,OpProgress *Progress);
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- pkgTagFile(FileFd &F,unsigned long Size = 32*1024);
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+ pkgTagFile(FileFd *F,unsigned long Size = 32*1024);
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* Configuration class is const-correct
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* The legacy ability to create a PkgFileIterator that started at Begin
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is gone, everyone should be using FileBegin().
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* A new dependency relation called obsoletes that is similar to conflicts.
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